Citric acid and alum were prepared as soluble powder (SP) formulations and tested against the second stage juveniles of Meloidogyne incognita under laboratory conditions. The prepared formulations passed successfully all physico-chemical properties for soluble powder formulation. The results showed that the two prepared SP formulations were effective against second stage juveniles of M. incognita. The highest effect was noticed after 96 hours. On the other hand, both SP formulations were more effective than their active ingredients. The effectiveness of the two prepared SP formulations was found after 96 hours to be greater than their active ingredients by 67 % for alum and 88 % for citric acid.